Lateral Line said:
Looks like a Bunocephalus species, possibly B. amazonicus or more probably B. coracoideus, it is the commonest one imported. There are 4-5 species that look pretty similar.
Spot on, it's a Banjo catfish
Bunocephalus coracoideus. I have two.
Blade, I have three Dragon gobies and they seem fine with eash other and everyone else.
There are three species sold as Dragon or Violet gobies and all three look very similar, two of them are peacefull, one of them, which has a slightly shorter body, can be aggresive towards tankmates of all species. Maybe you had the aggressive species
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